Adam Yauch's Last Performance at Bonnaroo 2009: Watch It

"So this is crazy," he said to fans at the time. "I have some pretty heavy news. I actually have a form of cancer."

It was June that same year – and 30 years after the band formed – he performed for what would be the last time. During their Bonnaroo set, Yauch (in the brown pants) jumped around less than his bandmates, but his rhymes were tight as ever.